Another staggering indicator of the concentration of wealth at the top in the U.S: When all household wealth is divided by the number of households, the mean household net worth in 2010 totals $498,800. But the median household net worth -- the level at which half the households have more and half have less -- was $77,300, meaning that the rich have so much that the average net worth in the U.S. is actually 6.5 times that of a typical American family.